Power extension device



FIG. 1 is a perspective view of a first embodiment of an ornamental design of a power extension device.

FIG. 2 is a right side view, with the left side view being a mirror image, of the first embodiment of an ornamental design of a power extension device.

FIG. 3 is a front view of the first embodiment of an ornamental design of a power extension device.

FIG. 4 is a back view of the first embodiment of an ornamental design of a power extension device.

FIG. 5 is a top view of the first embodiment of an ornamental design of a power extension device.

FIG. 6 is a perspective view of a second embodiment of an ornamental design of a power extension device.

FIG. 7 is a right side view, with the left side view being a mirror image, of the second embodiment of an ornamental design of a power extension device.

FIG. 8 is a front view of the second embodiment of an ornamental design of a power extension device.

FIG. 9 is a back view of the second embodiment of an ornamental design of a power extension device; and,

FIG. 10 is a top view of the second embodiment of an ornamental design of a power extension device.

The bottom of both embodiments is not part of the claim. 

CLAIM The ornamental design for a power extension device, as shown and described. 